No one runs wheel spacers will doing any serious off-roading. It's literally the worst idea.
Also wider wheels / offsets will require after market fenders at a certain point for full articulation which will be a problem given the body type.
Off-roaders crush and rip more fenders due to the wheels getting fully tucked and making contact with the wheel well than actually hitting the wheel well on obstacles. This is due to putting tires too large for the wheel well at full compression and or the suspension system not capable of...